<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script>
			/* var x=10;
			var y=20;
			console.log(x+y);
			var x="abc";
			console.log(x);
			console.log(typeof(x)); */
			let x=10;
			console.log(x);
			{
				let x=100;
				console.log(x);
			}
			console.log(x);
			const y=20;
			//y=10;
			console.log(y);
			
		</script>
	</head>
	<body>
	</body>
</html>
